Ok so i struggled with a "lamp out" ding and idiot light on my dash for a long time. i eventually traced it to a bad ground on the harness leading to my passenger headlight. I redid the ground and it was all good for a few weeks:

https://dodgeforum.com/forum/3rd-gen...cal-short.html

so now i am getting a "low washer" light on the dash. it is less annoying because it just dings once and stays on the entire time i am driving instead of constantly going off. of course the sensor is off the same harness as the one for the headlight (no "lamp out" issues still). there is plenty of fluid in the tank. could it be a bad sensor? does anyone know how the sensor works, in that if i cut the wires and twist them together will it turn the light off ot just keep it on?

these elsectrical problems are so annoying, really make owning this truck and PITA.

 

Can't you pull the harness off to see if you're getting constant power with a multimeter? If not then you know its not the sensor if so then more than likely its just the sensor.

 

Should be just some sort of switch. Unhook the connector, see if it goes away. If not, then get you a jumper wire and jumper pins together and see what that does. Just not sure if it is normally open or closed contacts. Either way, if the above does not make it go out, may be elsewhere in the wiring. If it does go out, think it would be the sensor in tank.

 

^^^ x2

 

There's a small plastic float with a metal tag on it in tge bottom of the resovouir. When the level drops the metal tag rises as the float drops and a "hall effect" switch signal is generated and fed to the PCM giving a Low washer fluid level.
Check the float action is not fouled and can swing freely.
Plus wiring of course.
Al.

 

Do this.... after replacing the sensor/float...

 

Not sure i understand why he should replace a sensor before troubleshooting first. I mean its a good possibility that it is the sensor but if he doesn't have power going to the sensor then obviously he needs to start troubleshooting backwards towards the problem. No need in replacing a sensor if its a wiring issue or something else IMO.

 

You can probe the sensor with a Multimeter. it should show low resistance(below 1kOhms, but generally anywhere between 5-800Ohms depending on the fluid level). If it shows high resistance(over 1k), then the sensor is bad.
If the sensor shows low resistance it is good. Then you can jumper the pigtail connector and see if the light goes out. If not, you have a wiring issue.
If the sensor is bad and reads high resistance, you can insert a resistor like 100ohms in between the pigtail contacts and just bypass the sensor all together. i wouldnt reccomend leaving the harness jumpered because there is no breaking point. The resistor will provide a breaking point if there is a problem.

 

The sensor is very cheap and if it is a simple sensor problem then he'll have saved himself TONS of time in troubleshooting the TIPM system.....

 

Thanks guys, I finally had time to mess with this today. I got the harness disconnected (breaking it a little...lol) and no more light. Reconnected it and it came back on. Only odd thing was that when the light was on and I disconnected it, the light stayed on until I restarted the truck. I guess it was just stored in the computer or something. So I guess it's the sensor in the resivour tank. I'll order be from somewhere and hope it fixes things.